Process of manufacturing chain-links.



J. M. Damn. PROGESS OF MANUFACTURING LINKS.

HPLIGATION FILE-I] MAIL. 12), 11908,

Patented Feb. 16, 1969a JAMES M. DODGE, OF PHILADELPHIA, PENNSYLVANIA.

PROCESS OF MANUFACTURING CHAIN-LINKS.

Specification of Letters Patent.

Patented Feb. 16, 1909.

Application filed. March 12, 1908. Serial No. 420,548.

To all whom it may concern:

Be it known that I, JAMES M. DODGE, a citizen of the United States,residing in Philadelphia, Pennsylvania, have invented certainImprovements in'the Process of Manufacturing Chain-Links, of which thefollowing is a specification.

The object of niy invention is to manufacture wrought metal chain linksin such a man-' ner that they can be readily and cheaply made by beingstruck up and welded.

In the accompanying drawing :Figure 1, is a view of one form of bar fromwhich the major portion of the link is to be made; Fig. 2, is a viewshowing the first reduction of the bar; Fig. 3, is a view showing thesecond reduction of the bar; Fig. 4, is a.view of the bent bar withcross piece of the link detachedtherefrom; Fig. 5, is 8. pers ectiveview of the completed lin Figs. 6 an 7, are views illus-- trating amodification; and Figs. 8 and 9, are views illustrating anothermodification.

In the manufacture of chain links, especially drive chain or conveyerchain links commonly known as Ewart links, the method has been tomanufacture the links of malleable iron, but the object of my presentinvention is to avail myself of the valuable properties of wrought metalfor the purpose, and at the same time to manufacture the links atsuchcost that they will not be undul ex ensive. In producing this link I reerab y utilize a bar of the shape shown in ig. 1, bending each end at a,a to form rounded portions, as shown in Fig. 2. The

a bar is then placed between suitable dies and struck up into the formshown in Fig. 3, the portions a, a forming loops having deep fiat ribsof the form shown in Fig. 3, and, in the present instance, laterallyflared or conical openings 1), b, and the next step in the process is tobend the bar on the line x, as, Fig. 3, to the osition shown in Fig. 4.An open slotted bar B is formed in any suitable manner and has flaringor conical ends which are of the same taper as the openings'b, b. Thisslotted baris then laced in position between the two arms 0, c o thelink and welded onto the portions a, (1, either by the process ofelectr1c weldingor by the common process. The

' link is then notched at e, e to permit it to be coupled to the slottedsocket bar B of the adommg 1n the same manner as in the Ewart hnk abovereferrrd to. In some bar of the adjoining link.

instances the ends of the socket bar B need not be tapered. In Figs. 6and 7, I have shown'the ends b of the socket bar 15 plain and fittingwithin the openings (1 in the arms 0, and welded, although I refer, whenthe link is to be electrically wel ed, to make the parts as shown inFig. 4, as the two arms 0, 0 can be forced tightly upon the socket bar Band by tapering the parts a muclrbetter weld can be produced.

In carrying out my invention thearms c 0 may be independent pieces asshown in Figs. 8 and 9; these pieces being welded to the socket bar, anda plain bolt 0 being utilized for the cross bar. When this bolt is usedI make the socket bar B tubular and attach one arm 0 to the other bypassing the bolt 0 through the openin s in the arms and through theopenlng o the tubular socket In carrying out my invention it. will beunderstood thatI may use any of the processes now in use forelectrically welding the parts of the link together, the particularprocess will depend upon the size and the pa rticular shape of the link,but a link made 1n accordance with my invention having the partselectrically welded will be very strong and comparatively clieap tomanufacture.

I claim 1. The process herein described .of manufacturing chain links,said process consisting in forming loops in the side members of thelinks and so arranging the said members that the loop of one member willbe directly opposite the loop of the other member, mounting a socket barso as to aline with the looped ortions of the side members of the link,and linally welding the parts together 2. The process herein describedof manufacturing links, said process consisting in formin conicalopenings in each side portion of a lin forming a socket bar with taperedends adapted to,the conical openings in the side members, and thenweldlng the bar to the side members.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

JAMES DODGE.

Witnesses I Jos. H. KLEIN, WM. A. BARR.

